Air cleaner



April 17, 1934. c. A. WINSLOW 1,955,354

AIR CLEANER Filed April 15, 1931 JIW 5 13 26 31 J 26 if '10 27 I I J 29 16 $6 J7 J2 .19- 22 11 i j! @3772?? Chm/3425 Q Winslow Patented Apr. 17, 1934 PATENT OFFICE AIR CLEANER Charles A. Winslow, Canton, Ohio, assignor to Catherine B. Winslow, Oakland, Calif.

Application April 15, 1931, Serial No. 530,180

4 Claims.

This invention relates to air cleaners, and more particularly to devices for cleaning air supplied to the carburetors of internal combustion engines and to air compressors and vthe like;

The principal object of the invention is the provision of an air cleaner that is extremely simple in construction, that may be manufactured at a minimum cost, that is composed of few parts, and that is efiicient in operation.

Another object of the invention is the provision of an air cleaner having an air filter that may be readily removed and that is simple in construction.

Other and further objects and advantages of the invention will appear from the following description taken in connection with the accompanying drawing, in which Fig. 1 is a side elevation of a carburetor showing the invention in vertical section in position thereon;

Fig. 2 is a vertical section of a modified form of construction;

Fig. 3 is a similar view of another modified form;

Fig. 4 is a side elevation with parts in section of another modified form of construction;

Fig. 5 is an end view thereof.

In the manufacture of air cleaners, considerable effort has been made to provide an inexpensive air filter that is eflicient and that may readily be removed and cleaned. The present invention is designed especially to meet these conditions, and while the unit may be encased in an elaborate and expensive casing for increasing its efiiciency it is not necessary that certain of the forms be encased or otherwise protected except by the foraminous material employed for supporting the filter material.

Referring now to Fig. 1 of the drawing, the 40 reference character designates generally a carburetor which may be of the usual or any wellknown construction having the intake passage 11 provided with the usual choke valve 12 and the discharge passage 13 having the throttle 14 therein, all of which is common in such constructions.

The filter member is designated generally by the reference character 15 and comprises a base member 16 and a cup or thimble shaped filter device 17. The base member 16 comprises a tubular support 18 which constitutes a discharge passage for the filter member 15. The inner end of the support 18 is slotted as at 19 whereby the same may be readily telescoped over the outer end of the intake 11 of the carburetor and is provided with a notch 21 for receiving the choke valve boss 22.

A suitableclamp 23 extending about the inner end of the support 18 and having its ends connected by a clamping bolt 24 is adapted to hold the tubular member in position on the endof the the carburetor intake. The outer end of the tubular member 18 is enlarged as by being flared and is provided with a channel 25 for receiving the inner end of the filter device 1'7, as will presently appear. The filter device comprises inner and outer members of foraminous material 26 and 27 between which is inserted the filter material 28. The filter material 28 may be hair, wool or other suitable fibrous material. That shown comprises a base of burlapor the like 29 in which hair or other fibrous material 31 has been woven or attached thereto.

The edges of the foraminous members 26 and 27 are turned outwardly and are seated in the channel 25 and secured therein by clamping the out-turned edges beneath the circular flange 32.

When it is desired to remove the device, it is only necessary to release the clamping bolt 24 and pull the tubular support 18 from the intake 11. Since there is no casing or housing surrounding'the filter material or element, the same may be readily cleaned by dipping it in kerosene or gasoline, after which oil may be poured on the element and the same replaced.

The form of construction shown in Fig. 2 differs from that just described in that the outer or enlarged end 33 of the tubular support 34 is distorted to form screw threads, and the filter element 35 is secured to a base member 36 which is provided with corresponding threads 37 for engaging the threads on the tubular support.

The base member 36 extends radially outwardly at its inner end and is provided at its edges with annular clamping flanges 38 and 39 for clamping the edges of the inner and outer foraminous members 41 and 42 respectively.

In the form of construction shown in Fig. 3, the inner end of the tubular support 43 is provided with bayonet slots 44 for receiving pins 45 on the carburetor intake 46. The outer end of V filter member 55 is provided with a metallic base portion 56 having a plurality of radially extending projections 57 which are bent to form cam members for engaging the clips 54 for holding the parts in assembled relation. In assembling the device the base portion 56 of the filter is brought into contact with the flange 53, with the lower edges of the projections 57 adjacent to the clips 54 and the device is then turned to bring the high portions of the projections into contact with the clips for resiliently clamping the base 56 against the fiange 53.

I claim as my invention:

1. In an air cleaner, a tubular supporting member, an enlargement on the outer end of said member, said enlargement being provided with a channel extending around the same, the periphery of said enlargement being retum-bent to form a clamping flange, an unconfined cupshaped filter member comprising an inner and an outer wire network seated within said channel, a cup-shaped filter element between said inner and outer network, the edges of said inner and outer network being brought together and clamped beneath said flange for holding said filter member seated in said channel.

2. In an air cleaner for internal combustion engines and the like, a tubular supporting member, means for detachably connecting the same to the carburetor intake of said engine, a hollow cup-shaped unencased filter member, air pervious over its entire exposed area, means for connecting the open end of said filter member to said supporting member, said means constituting the sole securing means and sole support for said filter member, said filter member comprising a cup-shaped casing member 01' foraminous material and a cup-shaped element of filter material telescoped over said casing material.

3. In an air cleaner for internal combustion engines and the like, a tubular supporting member having a peripheral recess extending about its outer end, means for detachably connecting said member to the carburetor intake of said engine, a hollow cup-shaped unencased filter member, air pervious over its entire exposed area, means for connecting the open end of said filter member to said supporting member, said means constituting the sole securing means and sole support for said filter member and including means for clamping the open end of said filter member in said recess, said filter member comprising a cupshaped casing member of foraminous material and a cup-shaped element of filter material telescoped over said casing material.

4. In an air cleaner for internal combustion engines and the like, a tubular supporting member, means for detachably connecting the same to the carburetor intake of said engine, a hollow cup-shaped unencased filter member, air pervious over its entire exposed area, means for connecting the open end of said filter member to said supporting member, said means constituting the sole'securing means and sole support for said filter member, said means comprising a screw threaded connection between the open end of said filter member and the outer end of said tubular supporting member, said filter member comprising a cup-shaped casing member of foraminous material and a cup-shaped element of filter material telescoped over said casing material.

CHARLES A. WINSLOW. 

